Removes mouse listeners from UserInputMonitor.

media/base/user_input_monitor_mac.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/base/user_input_monitor.h"
 
 #include <ApplicationServices/ApplicationServices.h>
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 
 namespace media {
 namespace {
 
 class UserInputMonitorMac : public UserInputMonitor {
  public:
   UserInputMonitorMac();
   ~UserInputMonitorMac() override;
 
   size_t GetKeyPressCount() const override;
 
  private:
   void StartKeyboardMonitoring() override;
   void StopKeyboardMonitoring() override;
-  void StartMouseMonitoring() override;
-  void StopMouseMonitoring() override;
 
   DISALLOW_COPY_AND_ASSIGN(UserInputMonitorMac);
 };
 
 UserInputMonitorMac::UserInputMonitorMac() {}
 
 UserInputMonitorMac::~UserInputMonitorMac() {}
 
 size_t UserInputMonitorMac::GetKeyPressCount() const {
   // Use |kCGEventSourceStateHIDSystemState| since we only want to count
   // hardware generated events.
   return CGEventSourceCounterForEventType(kCGEventSourceStateHIDSystemState,
                                           kCGEventKeyDown);
 }
 
 void UserInputMonitorMac::StartKeyboardMonitoring() {}
 
 void UserInputMonitorMac::StopKeyboardMonitoring() {}
 
-// TODO(jiayl): add the impl.
-void UserInputMonitorMac::StartMouseMonitoring() { NOTIMPLEMENTED(); }
-
-// TODO(jiayl): add the impl.
-void UserInputMonitorMac::StopMouseMonitoring() { NOTIMPLEMENTED(); }
-
 }  // namespace
 
 std::unique_ptr<UserInputMonitor> UserInputMonitor::Create(
     const scoped_refptr<base::SingleThreadTaskRunner>& input_task_runner,
     const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner) {
-  return base::WrapUnique(new UserInputMonitorMac);
+  return base::MakeUnique<UserInputMonitorMac>();
 }
 
 }  // namespace media